O2 Travel options on Contract - what's the difference?

[pgn]

As an O2 Contract customer of many years, I have had O2 Travel enabled for as long as I can remember.

With my move to O2 Refresh last January, and possibly the changes in EU phone call costs, I find I have an O2 Travel bolt-on on my account, but am also being offered what looks like a similar, but differently-named, bolt-on in my MyO2 Bolt-on's section.

Oh - I think I see it, the one I have has a cost cap of £40, the one I can add has a higher cap of £120.

Is that the only difference?

What I have:

What I'm offered in "Select a Bolt On to continue" section of MyO2:

[MI5 · Accepted solution]

Yeah, it just allows you to use more data (ergo, spend more money) before the cap kicks in.

[pgn]

Thanks, @MI5.

So when travelling in the USA, for example, the regular one gives you 8 days (at £4.99 a day) vs the higher one, which caps you on the 24th day or thereabouts?

It's an odd way of doing it, and an even odder way of naming the bolt-on, given the only difference is in the last few words of each description.

[MI5]

It only applies if not actually using the travel bolt on and are paying as you go.